08 Outlook | P0752, P0300, P0700 | Stuck Solenoid | PLEASE HELP!

[automaticfts]

2008 Saturn Outlook
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Errors:
P0752: Shift Solenoid A Stuck On
P0300: Random Misfire detected
P0700: Transmission Control System (MIL Request)
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Issue:
At complete random – check engine light comes on, vehicle seems to stick in 2nd gear and stay at high RPM (40-45mph) without being able to shift to third.
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Solutions Tried:
Replaced Spark Plugs
Replaced Spark Plug wires
Replaced all coils
Transmission Flush
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Notes:
I’ve tried all the above solutions, and it keeps coming back – usually several weeks to a month later. The weird & craziest thing to me is that I can disconnect the battery immediately after this issue occurs, it clears the check engine light and all errors, and drives & functions completely fine for weeks. I don’t understand if this is a mechanical issue like a damaged pressure switch, how the issue can be fixed (albeit temporarily) by clearing the error codes. With most other error codes I’ve ever dealt with clearing them lasts for a couple minutes and then they come right back.

Have any of you experienced this issue or have any advice/recommendations on what to try next? This YouTuber says that the most common problems related to the P0752 error is the waveplate (ring 423) breaking OR a pressure switch breaking. https://www.youtube.com/watch?v=7nRGQQ7wz9E
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I don’t want to keep throwing money at parts playing the guessing game – so hoping someone in this forum, much wiser than I, might have experienced and fixed this issue.

Thanks in advance!

[Sourshade]

I won't claim to be wiser but I have had an issue with a stuck solenoid "B" on a vehicle with the same transmission.

I pulled the TCM off and found 2 pressure switches that were damaged. Sonnex sells a replacement kit. While I had the TCM off, I removed the solenoids & cleaned the screens with MAF cleaner. Test them with a multimeter as well, to confirm they work. Mine had debris stuck inside. Worked fine after I cleaned it.


The pressure switches are simple to replace. The entire job is simple. Draw a sideview of the transmission on a piece of cardboard and pop the bolts into it as you remove them so everything goes back together properly. You can find the torque specs online along with videos showing the entire procedure.

It's a messy job but very easy and very cheap. Under $100. I brought the vehicle to 2 mechanics before I researched it myself. The first guy wanted to replace the entire transmission. The 2nd told me he wanted the replace the TCM. Makes you wonder eh...